Carbureter.



JOHN W. SWAN, 0F LOS ANGELES, CALIFORNIA.

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Specification of Letters Patent.

Patented J an. 26, 1915.

Application led February 26, A1912. Serial N o. 679,820.

To all 'whom it may concern Be it known that I, JOHN SwAN,.a citizen ofthe United States7 residing at Los Angeles, in the county of Los Angelesand ,State of California, have invented new and useful Improvements inCarbureters, of which the following is a specification.

This invention relates to improvements in carbureters for explosive gasengines, and it is an object of the invention to provide a carbureter inwhich the gasolene feed to the mixing chamber may be admitted throughthe throttle valve.

It is also an object of the invention to provide a carbui'eter having athrottle valve adapted Vto deliver gasolene within the mechanism andhaving a lever for operating the said valve, an adjustable needle valvemech anism being carried by said lever and throttle.

It is also an object of the invention to provide a carbuieter having acentral mixing chamber provided with an air inlet chamber at one end,said air inlet chamber having a series of openings in its walls and anapertured slide adapted to control the inlet of air through the openingof said'air chamber,.the carbureter having a gasolene deliveringthrottle located within the central air passage of the carbureter.

In the accompanying drawing forming a part of this specification, Figure1 is aside elevation of the improved carbureter, forming the subjectmatter of the present inventicn, the valve chamber containing the inletvalve mechanism controlled by the float being shown in section. Fig. 2is a central vertical sectional view through the carbureter taken on aplane at right angles to the plane of Fig. 1.` Fig. 3 is a horizontalsectional view through the valve meohani'sxi carried by the throttle.sectional view through the central passage of the carburetei and throughthe throttle Fig. 5 is a detailsectional view through themechanism formoving the needle valve .carried by thev valve mounted therein.

throttle. Fig. 6 is a fragmentary detail view in side elevation showingthe mechanism for controlling the extent to which the needle valve ofthe throttle is operated. Fig. 7 is a fragmentary detail sectional viewthrough the holding means for the adjusting lever shown in Fig. 6. i

Fig. 4 is a detail The details and features of the invention will now bemore particularly described, reference being had to the said drawing inwhich 10 indicates a carbureter casing provided with a centralcylindrical passage 11 forming a mixing chamber for the carbureter.Surrounding the chamber 11 is a float chamber 12 formed by the outerwalls of the casing together with the Walls of the passage 11 and afloat 13 is mounted insaid chamber and provided with a valve controllinglever 14. The lever extends into a hollow projection formed on thecasing 10 as indicated at l5, in which is mounted a valve lvadapted tocontrol the inlet of gasolene to the carbureter through a passage 17upon the end of which the said valve seats. of the said valve 16 and theaction of the Springs 18 and 19 effect the. action float is capable ofreadily operating the said valve: The said -float 13r is preferablyformed of a metallic piece of material bent into the proper form so thatthere are n0 soldered Vor otherwisesecured edges in the upper part ofthe I'iat and the lower part of the float is left open as 20, so thatair will be entrapped in the upper part of the float by the 'gasoleneand will. thus maintain a proper buoyancy in said float.

The lower end of the casing l0 is formed with a cylindrical extension 21affording an air chamber into and through which the air for thecarbureter is introduced. The bottoin of said chamber is formed with alarge inlet opening 22 which is normally closed by a spring pressedvalve 2,3, said valve moving upon a stem 24 having a head 25 upon itsinner end. A spring 26 confined between said head 25 and the valve 23normally holds 'the valve inclosed position.

The lower end of the stein 24 is preferably screw threaded at 27 and-anut 28 applied thereto, the said stem being thus adjustably heldinpositon in a supporting spider 29. The side Walls ofthe lsaid chamber21 are provided with` a series of perforations 30 at suitable intervals,adapted to provide proper air inlets for the carbureter. The openings 30are controlled by a ring slide 31, also formed with apertures as 32which may be brought into coincidence with the said air inlets 30, whenit is desired to introduce more air to the mixing chamber than willnormally enter past the valve 23. The said iooV Y place. One of saidhollow bearings is made n when inv closed position, and the saidthrottle"A valveis'also preferably made with double walls and havingupon one side of its pivotal point a broad passage therein. The centralportion of the throttle valve 36 is transf versely bored upon its axialline and hollow bearings extend into the opposite ends of said borefrom'l the adjacent casing of the carbu reter, to movably hold the saidthrottle in up of a hollowmember 37, having a screw threaded portion 38,engaging a screw threaded aperture formed in the casing, the outer endof said member 37 having a head portion 39 positioned in a horizontalcylindrical passage 40 in the side of the casing. The outer end of said.passage 40 is normally closed by a screw plug 41 so that it may be lremoved for inserting or removing the said member 37.A A passage 42 isalso formed in the casing 10, its lower end connecting with the floatchamber 12 while its upper end communicates with the cylindricalpassage' 40. The inner end of said tubular member 37 forms `a. valveseat, adapted to receive the tapered end of' a needle valve 43, whichenters the casing from the opposite side. The said needle valve iscarried by a tubular shaft 44 having a bearing 45 in the casing 10. Theinner end of said tubular shaft 45 extends well into the bore of thethrottle valve but a space is left between it and the valve seat topermit of the escape of gasolene into the passage 35 of the throttlevalve on one side, air also entering through an opening 464 in the hubof said throttle valve upon the other side, said ai`r passing into themixing chamber with the gasolene through the passage 35. The movement ofthe lair through the opening 46 and the passage 35, is constantlycarrying the gasolene through the passage 35 and into the mixing chamberabove the throttle, thoroughly spreading and mixing of the materialstherein.

T he outer end of the hollow shaft 44 is provided with an operatinglever 47, the upper end of which is perforated and adapted to beconnected with any usual or ordi.

nary operating rod not shown. The lever 47 is also provided at itsopposite end with a laterally projecting bracket 48 in which is pivoteda lever 49 adapted to control the needle valve. The inner end of thelever 49 isprovided with a screw threaded opening, in which is mountedan adjustable socket member 50, having a bearing 51 formed therein andadapted to receive a ball 52 formed upon the outer end of the valve stem53. The valve stem is preferably reduced in diameter at its outer end asshown in Figs. 3 and 5 of the drawing. Aspring pressed plunger 54 ismounted 1n the hollow member 50. The end of the lever which carries thehollow member is preferably split and provided with a screw 55 passingthrough the endsV thereof and adapted -to draw the split portionstogether upon the threads of the hollow 7 member 50, to Fock it inadjusted position. A spring 56 is interposedbetween the said split endof the lever 49 and the adjacentv part of the lever 47. The outer end ofthe.L lever 49 is provided-with an anti-friction "i rollery 57. adaptedto engage and be moved upon an adjustable rod 58. The said rod 58 iscentrally bent to follow the curved path of movement of the saidantifriction roller 57, and also to facilitate the adjustment of the Yintermediate portions thereof. The ends of said rod are supported byscrews and 6l which' are adjustably carried by'a plate 62 mounted uponthe side ofthe casing i0, the

'said plate surrounding the hollow shaft 45 The said anti-frictionVroller is.y

justing screws 60 and `61 at their outer ends,

while anV intermediate one 68 carries an intermediate adjusting screw 69which holds the central part ofthe bar-58 in the proper adjustedpositions. The set screws 60 and 61 are adjustably carried upon the saidarms 66 and 67 by means of circular nuts 7 0 and 71 having knurled orserrated edges, by which they may be turned for forcing the screws 60and 61 to different positions with respect to the arms 66 and 67. Asimilar knurled nut 72 is applied upon the inter- =mediate screw 69 foradjusting it. The said larms 66, 67, and 68, the said springs bearingupon the knurled edges of the adjusting nuts 70 and 71 and 72 so as totend to hold them against accidental turning. It will be understood thatthe adjustment of the Vscrews 60,

niaeaea y fre-m its seat v. ithin the throttle, to a greater and greaterextent as thesard throttle isl opened to a greater degree. Upon Vmovingthe lever in the opposite direction the antifriction roller 57 will rideoutwardly upon the rod 58 toward the screw (i0 so as to tend to closethe needle valve. To prevent forcing i the needle valve into too greatan extent, the

spring pressed bearing plunger 54 is provided which will yield after thevalve is seated.

rl'he relative relations of the screws 6l and 69 will produce thedesired operation of the needle valve in exact accordance with theaction of the throttle and with the amount of gasolene. which it isdesired to introduce through the same.

lt will be understood that the plate 62, with the parts thereon set forall desired movements in delivering a proper mixture of air and gasoleneto the mixing chamber, may be adjusted without disturbing the saidparts, upon loosening the screw 65 so that the time when the throttlebegins to admit gasolene fonthe initial or low speed running of theengine as when starting, may be nicely adjusted.

As shown in Fig. 6 the adjusting screws for the bar 58 may be providedwith means for setting them at a distance from the carbureter as forinstance at a point adjacent to the seat of the chauffeur. To accomplishthis purpose a bar is journaled upon the hub of the lever 47 and itsouter end is bifurcated and adapted to receive a worm 8l carried by ashaft 82. The said worm meshes with an actuating gear 83 journaled uponthe said arm 80. In this instance also the adjusting nuts as 84 and 85are provided with gear teeth upon their peripheries adapted to beengaged by the teeth of the actuating gear 88. When the arm 80 is swungso that the saidgear 83 meshes with either of the other gears 84 or 85and the shaft 82 is turned, the said nuts may be caused to adjust thescrews which carry the said rod 58. Spring pressed balls 88 engage theedges of said gears to hold them against accidental movement. A springpressed ball 86 carried bv the central portion of the arm 80 and adaptedto enga ge recesses 87 formed in the adjacent plate (52 for holdingthelsaid lever 8G either in or out of operative position.

The operation of the mechanism will be readily understood'from the abovedescription, and will require only a brief outline in addition thereto.The carbureter is supplied passage, and having a with gasolene throughthe float chamber in the usual way and after starting the engine thethrottle is opened more and more for speedingV up the engine andadmitting a greater quantity of air for the mixture de livered to theengine.

ln turning the throttle to admit more air the lever 49 is'operated foropening the needle valve and delivering a corresponding additionalquantity of gasolene. rlhe gasolene is carried through the passage ofthe throttle Valve by the air with which it becomes thoroughly mixed andinto the engine. The position of the throttle valve upon the shaft 44 iscontrolled by means of a set screw 90. Stops 91 and 92 are provided onthe plate 62 to limit the movement of the said lever 47. lVhenadditional air is required above that which normally passes through theinlet 22, the plate 3l is adjusted for opening the apertures 30.

What l claim is:

1. A carbureter having a central air passage therethrough, a throttlevalve mounted therein having a hollow hub portion with passagesextending therethrough. so as to distribute gasolene from the saidthrottle, a hollow trunnion entering the throttle from one side andadapted to deliver gasolene thereto` a hollow shank entering thethrottle from the other side and adapted to turn the same, a needlevalve mounted in said hollow shaft and adapted to seat in the end ofsaid hollow trunnion, and a lever mechanism controlling the hollow shaftand carrying valve controlling means adapted to operate according to theposition of the throttle, for delivering suitable quantities of gasolenethrough the said throttle.

2. A carbureter having an air passage extending therethrough, aflattened hollow throttle tiltingly mounted within said air gasoleneoutlet arranged centrally thereof, and communicating with a source ofgasolene. a hollow shaft for adjusting the said throttle, a leverconnected with the shaft for turning it, a needleA valve mounted in thehollow shaft, a lever carried bv the throttle lever and having' amovable engagement with the stem of the needle valve, and means mountedupon the casing for operating said needle valve lever to permit of anincreased discharge of gasolene as the throttle is opened.

3. A carbureter having a central air passage, a hollow tilting throttlemounted therein having gasolene discharge passages, means for deliveringgasolene to said lthrottle, a lever for turning the throttle, a needlevalve carried b v the throttle, a lever carried by the throttle lever, aspring interposed between said levers tending normally to unseat theneedle valve` an adjustable bearing carried by the needle valve leverfor seating or unseating the same, an adjustable bar engaging the outerend of said lever, and means for adjusting the said bar at variouspoints for controlling the movement of said needle valve in accordancewith the movement of the throttle.

4. A carbureter having an air passage, a mixing chamber extendingtherethrough, a throttle valve mounted therein, a needle valve carriedby the throttle valve and` controlling the discharge of gasolene intosaid mixing chamber, a lever for operating the throttle valve, a springactuated lever carried by the throttle, said lever having anantifriction roller at its outerend, a curved bar engaging saidanti-friction roller, a series of set-screws supporting said bar atvarious points, adjusting nuts engaging said for adjusting the saidplate with respect to the casing of the carbureter, arms projecting fromsaid plate and carrying said adjusting screws, nuts engaging said screwsand carried by said arms, and springs mounted upon said arms, andengaging the peripheries of said nuts tending to prevent theiraccidental movement. j

6. A carbureter, comprising an air passage, a mixing chamber extendingtherethrough, a tilting throttle valve mounted therein, a needle valvecarried by the throttle valve and controlling the discharge of volatilefluids in said mixing chamber,.a lever for operating the throttle valve,a

spring actuated lever carried by the throttle valve for operating theneedle valve, a bar carried in the path and engaging said springactuated lever, a pair of set screws pivotally and adjustably supportingsaid bar, and an intermediate screw bearing against said bar toadjustably alter the path traveled by said spring actuated lever.

In Witness that I claimrthe foregoing I have hereunto subscribed my namethis 20th day of February, 1912. Y

JOHN W. SWAN:

Witnesses:

E. STAELLMAN, EARLE R. POLLARD.

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